Digital Antenna's 1100 series antennas with a collet ferrule ensure no cable twisting and allows the antenna to be removed when needed. This new technique allows the use of existing coax or a new run of premium low loss cable. A taperedcollet securely locks Digital Antenna's 1100 series antenna to the bottom ferrule which mounts standard 1"-14 threads. All marine antennas are manufactured in the USA with 316 surgical stainless, UV stable high gloss finish and precision soldered components.